# Fibre Channel (SAN)

Occasional Contributor
Posts: 6
Registered: ‎07-05-2011

# HP SN6500B Brocade issue with LUN disconnections

I have a customer who has an existing 2x SAN fabrics consisting of Brocade 4900, 4100, 300 and 5800 in each fabric

Now he has purchased additional 2x  SN6500B Brocade switches (16GBps), with the plan to connect one switch to each of the existing fabrics and migrate and decommision the existing old switches.

Before the fabric merger, we had to change the value of ed_tov from the existing value of 5000 to 2000 in ALL switches (Old and new switches)  on both fabrics, as the existing value of 5000 had some comptibility issues with the new blade server enclosures.

Once the ed_tov values were matched on all switches, fabrics merged.

Post merger, we started the migration of devices from old switch switches to new switches.

But during the migration phase, we are noticing lot of continous LUN disconnection issues between the servers and storages.

All the servers are part of HP Blade enclosures and the Virtual Connects were already checked for firmware compatibility with the new 16GB switches.

Logs donot show much issues on old or new SAN switches.

Any thoughts ?

External Moderator
Posts: 4,854
Registered: ‎02-23-2004

## Re: HP SN6500B Brocade issue with LUN disconnections

factman,

what is 5800 ? I know 5800 named switches from QLOgic

is the NEW SN6500 connected to Brocade 300 or Old 4100 / 4900 ?

are in inrange wth FOS compatibility with new and old switches ?

for details refer the Release Notes.

TechHelp24
Occasional Contributor
Posts: 6
Registered: ‎07-05-2011

## Re: HP SN6500B Brocade issue with LUN disconnections

Sorry its 5480 ( its server enclosure embeded switch)

The 6500 is connected to 4900 and yes they are at the specific FOS levels

the 4900 is at 6.4.2b and the 6500 is at 7.4.1b and yes they are in line with the compatibility

External Moderator
Posts: 4,854
Registered: ‎02-23-2004

## Re: HP SN6500B Brocade issue with LUN disconnections

if all is correct configured, and new Brocade have correct Domain ID, you should be able to migrate from old 4900.

some time I facing the experience with old switch and very old Finisar SFP ( some old 4100 and 4900 was equipped with Finisar ) , and are not compatible with NEW 8Gb SFP+ or 16GB SFP+

try on 4900 with different SFP ideally Brocade SFP and set on 6500 the port fixed at 4Gb not Auto.

Alternative if 4900 is in the same fabric as 300 create ISL with is most simple.

TechHelp24
Occasional Contributor
Posts: 6
Registered: ‎07-05-2011

## Re: HP SN6500B Brocade issue with LUN disconnections

The new switch 6500 is perfectly merged in the old fabrics.

The ISL connected is between old 4900 and the new 6500 (in each fabric)

So the question is post migration of devices from the 4900/4100/300 (on each fabric) to new 6500 (on each fabric) we are getting frequent LUN disconnect issues between servers and storage.

So anything to check ?

External Moderator
Posts: 4,854
Registered: ‎02-23-2004

## Re: HP SN6500B Brocade issue with LUN disconnections

Ok, I understand first you have a issue by config Migration.

-->But during the migration phase, we are noticing lot of continous LUN disconnection issues between the servers and storages.

this can be caused due incomapatbility, or multipath Server/Storage is not work correct, so when you disconnect one Path from Fabric_A and the Second path in Fabric_B is not working correct, you see LUN as disconnected.

In a AIX environment in example, is not simple to do such a migration.

switchshoiw, storage type, portcfgshow <--> Server and Storage

TechHelp24
Occasional Contributor
Posts: 6
Registered: ‎07-05-2011

## Re: HP SN6500B Brocade issue with LUN disconnections

switchshow :
CURRENT CONTEXT -- 0 , 128
switchName: More-Kol-SAN1
switchType: 133.0
switchState: Online
switchMode: Native
switchRole: Principal
switchDomain: 8
switchId: xxxxxxx
switchWwn: xxxxxxxxxxxxxxxxxx
zoning: OFF
switchBeacon: OFF
FC Router: OFF
HIF Mode: OFF
Allow XISL Use: OFF
LS Attributes: [FID: 128, Base Switch: No, Default Switch: Yes, Address Mode 0]

portcfgshow :
CURRENT CONTEXT -- 0 , 128

Ports of Slot 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
----------------------+---+---+---+---+-----+---+---+---+-----+---+---+---+-----+---+---+---
Octet Speed Combo 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Speed AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN AN
AL_PA Offset 13 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Trunk Port .. ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON
Long Distance .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
VC Link Init .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Locked L_Port - - - - - - - - - - - - - - - -
Locked G_Port ON ON ON ON .. .. .. .. .. .. .. .. .. .. .. ..
Disabled E_Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Locked E_Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
ISL R_RDY Mode .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
RSCN Suppressed .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Persistent Disable .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
LOS TOV mode 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
NPIV capability ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON
NPIV PP Limit 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
NPIV FLOGI Logout .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
QOS Port AE AE AE AE AE AE AE AE AE AE AE AE AE AE AE AE
EX Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Mirror Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Rate Limit .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Credit Recovery ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON
Fport Buffers .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Eport Credits .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Port Auto Disable .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
CSCTL mode .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
D-Port mode .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
D-Port over DWDM .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Compression .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Encryption .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
FEC ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON
FEC via TTS .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Fault Delay 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SIM Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Non-DFE .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
TDZ mode .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..

Port 0 is one of the Storage portcfgshow
Port 1 is one of the Server port

Ports of Slot 0 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
----------------------+---+---+---+---+-----+---+---+---+-----+---+---+---+-----+---+---+---
Octet Speed Combo 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Speed AN AN AN AN AN AN AN AN 4G 4G 4G 4G 8G 8G 8G 8G
AL_PA Offset 13 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Trunk Port ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON
Long Distance .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
VC Link Init .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Locked L_Port - - - - - - - - - - - - - - - -
Locked G_Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Disabled E_Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Locked E_Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
ISL R_RDY Mode .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
RSCN Suppressed .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Persistent Disable .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
LOS TOV mode 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
NPIV capability ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON
NPIV PP Limit 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
NPIV FLOGI Logout .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
QOS Port AE AE AE AE AE AE AE AE AE AE AE AE AE AE AE AE
EX Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Mirror Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Rate Limit .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Credit Recovery ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON
Fport Buffers .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Eport Credits .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Port Auto Disable .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
CSCTL mode .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
D-Port mode .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
D-Port over DWDM .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Compression .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Encryption .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
FEC ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON
FEC via TTS .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Fault Delay 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SIM Port .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Non-DFE .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
TDZ mode .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..

Port 88 to 91 is the ISL ports to 4900

Occasional Contributor
Posts: 6
Registered: ‎07-05-2011

## Re: HP SN6500B Brocade issue with LUN disconnections

Storage type is HP StoreServe 20450